05-24-2019, 01:44 PM | #1 |
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Audio Hardware Device Name
Jack Winter told me when I was first getting into Linux that I should always try to use the actual hardware device name as opposed to it's assigned number. Well today I finally had a case where something I setup almost a year ago quit working and it took me a cool minute to figure out why.
I use two M-Audio Delta 2496 cards and have to use zita-a2j to make them both available. Way back when I first set it all up I used the line "zita-a2j -d hw:3 &" in a script file that QjackCtl launches and for almost a year it's worked every time, but today I was going to record some drums and the second two channels were no longer working. Thinking back to what changed recently the only item was an Akai MPD26 was connected at boot time, so I unplugged it, rebooted and found that my second two inputs were working again. At that point I knew some reference to hardware was being done by number rather than by name and sure enough it was in my startup file for QjackCtl. I changed the line to this "zita-a2j -d hw:M2496_1 &" and then tried rebooting with and without the Akai MPD26 plugged into a USB port and REAPER now sees all four inputs whether the Akai is plugged in or not. The moral of the story is to always use the device name like Jack says! |
05-24-2019, 06:50 PM | #2 | |
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05-24-2019, 08:21 PM | #3 | |
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Turns out that having that Akai MPD26 plugged in also causes my midi ports to get shuffled. I have two midi interfaces on the M-Audio cards plus the midi on the Akai. I've got it all working now, but it's making me think more seriously about getting a Behringer UMC1820 interface with 8 mic inputs. |
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05-24-2019, 11:29 PM | #4 |
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I'm ignoring you as I'm on vacation in Italy. In fact at a pizza convention as making pizza is another passion of mine
That said, you can find the name of the device with "cat /proc/asound/cards", the name of the devices is the one between the [] brackets. There is also a way to nail a device to a specific "index" using the modprobe configuration file.
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05-25-2019, 01:31 PM | #5 | |
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0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xdf220000 irq 128 1 [CODEC ]: USB-Audio - USB Audio CODEC Burr-Brown from TI USB Audio CODEC at usb-0000:00:14.0-1, full speed 2 [Loopback ]: Loopback - Loopback Loopback 1 I'm bad at these things, I know Thanks
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05-25-2019, 03:46 PM | #6 | |
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You would only need to be sure anywhere you are currently referencing your hardware, that you use the name instead of it's number. If you are using ALSA and picked the device in REAPER it will already have the name of the hardware, but if you have any other scripts that prepare things before REAPER starts (which was my case), that's a place that can be a problem later down the line. |
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05-25-2019, 06:52 PM | #7 | |
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I used to brew my own beer and we'd frequently turn each other onto beers and pizzas. |
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05-26-2019, 02:22 AM | #8 |
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+1
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06-01-2019, 03:18 PM | #9 |
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I had a similar issue recently with an AKAI MPK mini keyboard:
https://linuxmusicians.com/viewtopic...107227#p107227
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06-01-2019, 04:46 PM | #10 | |
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06-03-2019, 08:53 AM | #11 |
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Actually I have to look up the the command is doing. I think it's a Device / Kernel incompatibility.
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06-03-2019, 12:07 PM | #12 | |
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I power my computer and everything else totally off with a master rack mount power center, but when I reboot I frequently have to unplug and reinsert the Flirc for it to be recognized. From a powered off state that doesn't happen. That said, I still love the Flirc and taught mine to use the same remote that powers on my two monitors. It can learn the IR codes from just about any remote contol, and then lets you assign keystrokes, media commands, and macros to individual buttons. |
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06-03-2019, 12:56 PM | #13 | |
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06-03-2019, 01:04 PM | #14 | |
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